The three-dimensional (3-D)

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We report the observation of anomalous Hall resistivity in single crystals of EuAl 4 , a centrosymmetric tetragonal compound, which exhibits coexisting antiferromagnetic (AFM) and charge-density-wave (CDW) orders with onset at T N ∼ 15.6 K and T CDW ∼ 140 K, respectively. In the AFM state, when the magnetic field is applied along the c-axis direction, EuAl 4 undergoes a series of metamagnetic transitions. Within this field range, we observe a clear hump-like anomaly in the Hall resistivity, representing part of the anomalous Hall resistivity. By considering different scenarios, we conclude that such a hump-like feature is most likely a manifestation of the topological Hall effect, normally occurring in noncentrosymmetric materials known to host nontrivial topological spin textures. In view of this, EuAl 4 would represent a rare case where the topological Hall effect not only arises in a centrosymmetric structure, but it also coexists with CDW order.